The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1976
Filed:
Dec. 15, 1975
Hans Eschler, Munich, D;
Siemens Aktiengesellschaft, Berlin & Munich, D;
Abstract
A linear data input transducer for modulating an object beam from a laser which is subsequently projected along with a reference beam onto a storage medium to holographically record data characterized by the transducer having a first acousto-optical light deflector for deflecting the object beam in a first direction, a second acousto-optical light deflector for deflecting the beam in a second direction, each of the first and second deflectors having sound waves extending at right angles to each other, and a device for applying a signal input to each deflector which includes a chain of high frequency oscillators which are independently actuated and an adder circuit for combining the output of the oscillators into the signal input. In one embodiment of the invention, the transducer has a single acousto-optical cell with the sound transducers disposed on the surface extending at right angles so that the transducer is a compact light deflector. In another embodiment, the transducer is composed of two separate cells which are aligned with the second light deflector receiving the beams deflected by the first light deflector.